> There are times where the grid is producing more energy than is being demanded That never happens. The production and demand in the electric grid must always

> There are times where the grid is producing more energy than is being demanded That never happens. The production and demand in the electric grid must always be matched. When they are not, the voltage and frequency increase (excess production) or decrease (excess demand), and control mechanisms on all generators in the grid regulate the production so that it matches the demand again; if that's not possible (because the production and demand are too mismatched), safety mechanisms disconnect parts of the grid (and power off the generators) to avoid costly damage.